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/* Target-dependent code for PowerPC systems running NetBSD.
Copyright 2002, 2003 Free Software Foundation, Inc.
Contributed by Wasabi Systems, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include "defs.h"
#include "gdbcore.h"
#include "regcache.h"
#include "target.h"
#include "breakpoint.h"
#include "value.h"
#include "osabi.h"
#include "ppc-tdep.h"
#include "ppcnbsd-tdep.h"
#include "nbsd-tdep.h"
#include "solib-svr4.h"
#define REG_FIXREG_OFFSET(x) ((x) * 4)
#define REG_LR_OFFSET (32 * 4)
#define REG_CR_OFFSET (33 * 4)
#define REG_XER_OFFSET (34 * 4)
#define REG_CTR_OFFSET (35 * 4)
#define REG_PC_OFFSET (36 * 4)
#define SIZEOF_STRUCT_REG (37 * 4)
#define FPREG_FPR_OFFSET(x) ((x) * 8)
#define FPREG_FPSCR_OFFSET (32 * 8)
#define SIZEOF_STRUCT_FPREG (33 * 8)
void
ppcnbsd_supply_reg (char *regs, int regno)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
int i;
for (i = 0; i <= 31; i++)
{
if (regno == i || regno == -1)
supply_register (i, regs + REG_FIXREG_OFFSET (i));
}
if (regno == tdep->ppc_lr_regnum || regno == -1)
supply_register (tdep->ppc_lr_regnum, regs + REG_LR_OFFSET);
if (regno == tdep->ppc_cr_regnum || regno == -1)
supply_register (tdep->ppc_cr_regnum, regs + REG_CR_OFFSET);
if (regno == tdep->ppc_xer_regnum || regno == -1)
supply_register (tdep->ppc_xer_regnum, regs + REG_XER_OFFSET);
if (regno == tdep->ppc_ctr_regnum || regno == -1)
supply_register (tdep->ppc_ctr_regnum, regs + REG_CTR_OFFSET);
if (regno == PC_REGNUM || regno == -1)
supply_register (PC_REGNUM, regs + REG_PC_OFFSET);
}
void
ppcnbsd_fill_reg (char *regs, int regno)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
int i;
for (i = 0; i <= 31; i++)
{
if (regno == i || regno == -1)
regcache_collect (i, regs + REG_FIXREG_OFFSET (i));
}
if (regno == tdep->ppc_lr_regnum || regno == -1)
regcache_collect (tdep->ppc_lr_regnum, regs + REG_LR_OFFSET);
if (regno == tdep->ppc_cr_regnum || regno == -1)
regcache_collect (tdep->ppc_cr_regnum, regs + REG_CR_OFFSET);
if (regno == tdep->ppc_xer_regnum || regno == -1)
regcache_collect (tdep->ppc_xer_regnum, regs + REG_XER_OFFSET);
if (regno == tdep->ppc_ctr_regnum || regno == -1)
regcache_collect (tdep->ppc_ctr_regnum, regs + REG_CTR_OFFSET);
if (regno == PC_REGNUM || regno == -1)
regcache_collect (PC_REGNUM, regs + REG_PC_OFFSET);
}
void
ppcnbsd_supply_fpreg (char *fpregs, int regno)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
int i;
for (i = FP0_REGNUM; i <= FP0_REGNUM + 31; i++)
{
if (regno == i || regno == -1)
supply_register (i, fpregs + FPREG_FPR_OFFSET (i - FP0_REGNUM));
}
if (regno == tdep->ppc_fpscr_regnum || regno == -1)
supply_register (tdep->ppc_fpscr_regnum, fpregs + FPREG_FPSCR_OFFSET);
}
void
ppcnbsd_fill_fpreg (char *fpregs, int regno)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (current_gdbarch);
int i;
for (i = FP0_REGNUM; i <= FP0_REGNUM + 31; i++)
{
if (regno == i || regno == -1)
regcache_collect (i, fpregs + FPREG_FPR_OFFSET (i - FP0_REGNUM));
}
if (regno == tdep->ppc_fpscr_regnum || regno == -1)
regcache_collect (tdep->ppc_fpscr_regnum, fpregs + FPREG_FPSCR_OFFSET);
}
static void
fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, int which,
CORE_ADDR ignore)
{
char *regs, *fpregs;
/* We get everything from one section. */
if (which != 0)
return;
regs = core_reg_sect;
fpregs = core_reg_sect + SIZEOF_STRUCT_REG;
/* Integer registers. */
ppcnbsd_supply_reg (regs, -1);
/* Floating point registers. */
ppcnbsd_supply_fpreg (fpregs, -1);
}
static void
fetch_elfcore_registers (char *core_reg_sect, unsigned core_reg_size, int which,
CORE_ADDR ignore)
{
switch (which)
{
case 0: /* Integer registers. */
if (core_reg_size != SIZEOF_STRUCT_REG)
warning ("Wrong size register set in core file.");
else
ppcnbsd_supply_reg (core_reg_sect, -1);
break;
case 2: /* Floating point registers. */
if (core_reg_size != SIZEOF_STRUCT_FPREG)
warning ("Wrong size FP register set in core file.");
else
ppcnbsd_supply_fpreg (core_reg_sect, -1);
break;
default:
/* Don't know what kind of register request this is; just ignore it. */
break;
}
}
static struct core_fns ppcnbsd_core_fns =
{
bfd_target_unknown_flavour, /* core_flavour */
default_check_format, /* check_format */
default_core_sniffer, /* core_sniffer */
fetch_core_registers, /* core_read_registers */
NULL /* next */
};
static struct core_fns ppcnbsd_elfcore_fns =
{
bfd_target_elf_flavour, /* core_flavour */
default_check_format, /* check_format */
default_core_sniffer, /* core_sniffer */
fetch_elfcore_registers, /* core_read_registers */
NULL /* next */
};
static int
ppcnbsd_pc_in_sigtramp (CORE_ADDR pc, char *func_name)
{
/* FIXME: Need to add support for kernel-provided signal trampolines. */
return (nbsd_pc_in_sigtramp (pc, func_name));
}
/* NetBSD is confused. It appears that 1.5 was using the correct SVr4
convention but, 1.6 switched to the below broken convention. For
the moment use the broken convention. Ulgh!. */
static enum return_value_convention
ppcnbsd_return_value (struct gdbarch *gdbarch, struct type *valtype,
struct regcache *regcache, void *readbuf,
const void *writebuf)
{
if ((TYPE_CODE (valtype) == TYPE_CODE_STRUCT
|| TYPE_CODE (valtype) == TYPE_CODE_UNION)
&& !((TYPE_LENGTH (valtype) == 16 || TYPE_LENGTH (valtype) == 8)
&& TYPE_VECTOR (valtype))
&& !(TYPE_LENGTH (valtype) == 1
|| TYPE_LENGTH (valtype) == 2
|| TYPE_LENGTH (valtype) == 4
|| TYPE_LENGTH (valtype) == 8))
return RETURN_VALUE_STRUCT_CONVENTION;
else
return ppc_sysv_abi_broken_return_value (gdbarch, valtype, regcache,
readbuf, writebuf);
}
static void
ppcnbsd_init_abi (struct gdbarch_info info,
struct gdbarch *gdbarch)
{
set_gdbarch_deprecated_pc_in_sigtramp (gdbarch, ppcnbsd_pc_in_sigtramp);
/* For NetBSD, this is an on again, off again thing. Some systems
do use the broken struct convention, and some don't. */
set_gdbarch_return_value (gdbarch, ppcnbsd_return_value);
set_solib_svr4_fetch_link_map_offsets (gdbarch,
nbsd_ilp32_solib_svr4_fetch_link_map_offsets);
}
void
_initialize_ppcnbsd_tdep (void)
{
gdbarch_register_osabi (bfd_arch_powerpc, 0, GDB_OSABI_NETBSD_ELF,
ppcnbsd_init_abi);
add_core_fns (&ppcnbsd_core_fns);
add_core_fns (&ppcnbsd_elfcore_fns);
}
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